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EP 4 387 801 A1

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(43) Date of publication: 26.06.2024 Bulletin 2024/26 (21) Application number: 22754149.7 (22) Date of filing: 03.08.2022

(51) International Patent Classification (IPC):  B23K 15/00(2006.01) H01M 50/502(2021.01) H01M 10/04(2006.01) B23K 103/10(2006.01) H01J 37/315(2006.01) H01M 50/516(2021.01) B23K 101/38(2006.01) B23K 103/12(2006.01) (52) Cooperative Patent Classification (CPC): B23K 15/0006; B23K 15/0013; B23K 15/002; B23K 15/008; B23K 2101/38; B23K 2103/12; B23K 2103/10; H01M 50/516; Y02E 60/10; H01M 2220/20; H01M 50/528; H01M 50/503; H01J 2237/3104 (86) International application number: PCT/GB2022/052043 (87) International publication number: WO 2023/021266 (23.02.2023 Gazette 2023/08)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 18.08.2021 GB 202111837 (71) Applicant: TWI Limited Cambridge, Cambridgeshire CB21 6AL (GB)	(72) Inventors: RIBTON, Colin Nigel Cambridgeshire CB21 6AL (GB) JEFIMOVS, Vitalijs Cambridgeshire CB21 6AL (GB) (74) Representative: Gill Jennings & Every LLP  The Broadgate Tower 20 Primrose Street London EC2A 2ES London EC2A 2ES (GB)